21620518

素因数分解:

$2^1\times {\mathrm{19}}^1\times {\mathrm{137}}^1\times {\mathrm{4153}}^1$

素因数の和:4311

約数の個数: 16

約数和(自身を含む): 34395120

約数和(自身を除く): 12774602

約数列:

[1, 2, 19, 38, 137, 274, 2603, 4153, 5206, 8306, 78907, 157814, 568961, 1137922, 10810259, 21620518]

約数ペア:

[(1, 21620518), (2, 10810259), (19, 1137922), (38, 568961), (137, 157814), (274, 78907), (2603, 8306), (4153, 5206)]